Loud, jerky shifting.

When shifting gears, you hear a grinding sound and feel a sudden jerk as the gears change.

Pedaling with Excessive Force While Shifting.

This could be the most simple cause; try timing your shifts while coasting or going down hill.

If loud, jerky shifting persists, read on.

Lack of Lubrication.

It is fairly common to have the chain bind and slip due to low lubrication or excessive dirt. If there is any dirt buildup or lack of lubrication this could be your problem. Click here for a video with instructions for cleaning and lubricating your chain.

If your inspection reveals visible damage, read on.

Visible Damage.

Inspect the following components for visible damage:

Front derailleur

Rear derailleur

Cassette

Chainring

If you find that any of these components are damaged beyond repair, you can find additional parts by clicking the following link: Bizrate.com

Brakes not operating properly.

Brakes not effectively slowing or stopping your bicycle.

Using only Rear Brakes.

This is not utilizing your full braking potential, try using your front brakes also as this will greatly increase your ability to stop effectively.

If this does not improve your stopping ability, read on.

Loose/Disconnected Brake Cable

Inspect cable connections at handle and brake calipers to be sure they are securely connected and the cable is not slack.

Bicycle Wobbles

Spokes not Properly Tensioned

If you notice, upon inspection of your wheels, that some of your spokes feel loose, take appropriate steps to re-tension them. For instructions see the following YouTube video: How to Tension a Bicycle Wheel

Bent Rim

In some cases, adjusting spoke tensions will not suffice. If your rim is bent, it may need to be replaced, you can follow steps 1 through 6 in the Mt. Fury Roadmaster Tire Replacement guide for instructions on removing the rim.

Trouble Steering

Bike veers from the direction you intended to steer towards.

Flat tire

Apply pressure on both tires with your hand. If the tire does not keep its shape you may need to pump up your tires. When you are pumping up your tire make sure that the gauge on the pump does not read more than 40-50 psi.

If your tire does not hold the pressure recommended then you will have to replace or patch the inner tube of the tire. See repair guide for instructions on how to replace the inner tube: Mt. Fury Roadmaster Tire Replacement

Misaligned Handlebars

Check that your handlebars are perpendicular to your front tire. If not, the following YouTube video could prove helpful:Adjusting Handlebars Beginning at 1:40 you'll find handle bar adjustment instructions that would be applicable to the Mt Fury Roadmaster